Compressing alt.sex.pictures files

[Peter da Silva]

In article <eillihca.651947189 at fizzle.stanford.edu> eillihca at fizzle.stanford.edu (Achille Hui) writes:
> peter at sugar.hackercorp.com (Peter da Silva) writes:
> >I believe that XORing alternate scan-lines and run-length-encoding the result
> >would do a better job.

> 2) XOR neighbouring scan lines in raw image and then compress it.
> 3) subtract neighbouring ......
> 2,3)	~ 110% [of original]

Yes, but as Kent pointed out later on, LZW is poorly adapted to dealing with
that sort of data set. Have you tried run-length encoding?
-- 
Peter da Silva.   `-_-'
<peter at sugar.hackercorp.com>.